Okay, the two particular long guns in question are of German origin, reconverted and in the case of one of them, probably spuriously marked with a very famous stocker's name, "Albrecht". Possibly, one or both may have stretched barrels or stocks, which would take a visit to Morphy's in order to verify.
I would submit from my point of view, as a newcomer to longrifle study, that the study of German longrifles and fowlers, maybe not these two particular guns at Morphy's, is important for novices to understand the origins of the American stocked longrifle.
Also, it has been established that many German rifles and fowlers from the 17th and early 18th Centuries were imported by people like Casper Wistar and used by settlers. Yes, they had shorter barrels and different stock architecture, etc, etc, but from a historical perspective, they are important. My personal concern as an arms historian, is that we do not discourage study and possible collecting of these guns by novices like me, again not the two Morphy examples, or their value, historical significance, and contribution to North American history.
I am very aware that many of the guys on this forum have been studying the longrifles for many years and have amassed a great deal of knowledge and experience. Those of us that are newcomers very greatly appreciate their willingness to share their points of view.
I would recommend to my fellow newcomers to longrifles, my new friend Bob Lienemann's book
Moravian GunmakingII to get a perspective on the significance of imported German 18th Century long guns. He devotes one whole chapter to a very particular German rifle and a second chapter to the Marshall Rifle which may or may not be a restocked (that statement may get some peoples nuts in a knot) earlier German import. Great photos throughout the book.
Speaking for myself, after 40 years of studying and writing about early Springfield Armory longarms, I'm so deep in the weeds with them that I may never find my way out. I do understand and appreciate where the more experienced longrifle students and collectors on this forum are coming from.
It is Sunday so I can preach and get away with it.